<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script>
document.addEventListener("DOMContentLoaded", () => {
  window.find("a");
  document.addEventListener("DOMNodeRemoved", () => {
    try {
      document.getElementById("target").normalize();
      document.execCommand("removeFormat");
    } catch (e) {
    }
  });
  document.adoptNode(document.querySelector("datalist"));
});
</script>
</head>
<body>
<kbd>
<datalist>
</kbd>
<figcaption contenteditable>
<font id="target">
a
</font>
</figcaption>
</body>
</html>
